Github user justinleet commented on the issue:
https://github.com/apache/incubator-metron/pull/196
Initial Travis build, from before the cache is populated, downloads
everything
https://travis-ci.org/justinleet/incubator-metron/builds/145862346#L174
Afterwards, on a whitespace commit no longer downloads the dependencies
https://travis-ci.org/justinleet/incubator-metron/builds/145870931#L171
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